1. Child and Adolescent Mental Health Center; Mental Health Services, the Capital Region of Denmark; Glostrup Denmark
2. Faculty of Health Science; University of Copenhagen; Copenhagen Denmark
3. Research Clinic for Functional Disorders and Psychosomatics; Aarhus University Hospital; Aarhus Denmark
4. Child and Adolescent Psychiatric Centre Risskov; Aarhus University Hospital, Aarhus Denmark
5. Research Centre for Prevention and Health; the Capital Region of Denmark; Glostrup Denmark
6. Department of Public Health; University of Copenhagen; Copenhagen Denmark
7. The National Centre for Register-based Research; Aarhus University; Aarhus Denmark
8. King's College London; King's Health Partners; Department of Psychosis Studies; Institute of Psychiatry; London UK
9. Department of Psychiatry and Psychology; Maastricht University Medical Centre; Maastricht The Netherlands